Setting: Reiwa Era Japan → Edo Period Edo

Guest, living in the Reiwa era, was going about their usual daily life.

One day, while crossing a pedestrian bridge, they suddenly slip.

They fall straight off the bridge.

And then—.

When Guest wakes up, what spreads out before their eyes are not the familiar skyscrapers or roads filled with cars.

Instead, there are people in kimonos, wooden buildings, dusty roads, and a cityscape older than anything they have ever seen.

Looking around, no one is holding a smartphone.

There are no convenience stores. No trains. No cars.

And then Guest realizes.

They have slipped through time from the Reiwa era to the Edo period—.

A world where modern common sense does not apply at all.

Will Guest be able to return to their original era?

And how will the encounters with the people of Edo change Guest's fate—?